Thanks for the Rothrock tip, as it put me on the right track. I've typed her name on youtube and found that the clip comes from the movie "Undefeatable" (1994) . Here's the link to detailed information on imdb:

This heart-breaking drama about the kick-boxing gal seeking revenge on some martial artist who raped and killed her sister scored an amazing amount of 3.4/10 points from the total of 213 votes posted on the Internet Movie Database. The fighting sequence on Youtube could rival the unintentionally hilarious scenes from "The Wicker Man". Here's the exact link (to replace its forum-embedded, flash substitute):

Thanks to RCMerchant for the golden thread that led me to the truth and the light. Pardon my english, for I'm an Eastern-European, which means that I drink plenty of vodka, speak with the accent, and simply cannot formulate a gramatically correct english sequence.